/Engine/Plugins/FX/Niagara/Source/Niagara/Classes/NiagaraDataInterfaceSpline.h
struct FNiagaraDataInterfaceProxySpline : public [FNiagaraDataInterfaceProxy](API\Plugins\Niagara\FNiagaraDataInterfaceProxy)
TMap<FNiagaraS...
SystemInstancesToProxyData_RT
List of proxy data for each system instance.